Improved mixing-apparatus for preparing- waste coal for fuel



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T. M. MITCHELL, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THEANLHRA` CITE-F[HEL-MANUFACTURING) COMPANY, OF PHILADELPHIA.

Leners Parent No. 92,738, daad July 2o, 1869.

IMPRQ'V'ED MIXING-APPARATUS FOR PREPARING- WASTE COAL FOR FUEL.

The Schedule referred to in these Letters Pate-nt and making part of the same.

To all whom 'it may concern:

Be it lmoWnt11atI,T.M. MITCHELL, engineer, of the city ot' Philadelphia, in the State of' Pennsylvania, have invented a new and. useful Mixing-Machine, for Service in the Process of Utilizing the Waste Coal of machine Figure 2, a horizontal section of the same below the dotted line fc-o of' fig. 3; and

Figure 3, a vertical section above the dotted line w-w 0f fig. 2.

Like letters and numbers of reference indicate the same parts when iu the different figures.

The nature of my invention consists, substantially as hereinafter described and specified, in the construction and arrangement of a series ot' vertical shafts, provided with horizontal arms, having vertical projections, and adjustably Afixed thereon, the said shafts being arranged, and caused to rotate simultaneously, within a cylindrical upright. vessel, having small pert'orations in its sides, opening into a surrounding steamjacket, and a series oi' discharge-openings, fitted with adjustable stoppers or sliding plates in its bottom, all for the purpose of receiving, and thoroughly or intimately mixing, in a hot,.moist condition, the purified coaI-powder, and the requisite agglutinating-materials, in making artiticial fuel and other' compounds, and

'discharging the same, for subsequent condensation or compression.

Referring to the drawings- A is the steam-jacket surrounding the cylindrical vessel B, and

1) b', the sliding Stoppers in the bottom of the saidA lneous rotary motions are given to the armed shafts C.

The cylindrical vessel B is made of plate-iron, its top plate having a large opening in its centre, and its bottom plate provided with a series of outlet-openings, iitted with the adjustable valve-plates or slides b', so that the said outlets can bev readily-closedand opened, as occasion lnay require.

The sides of the vessel B are perforated with four or more verticalV series of small holes, 3 3, for the admission ot steam from the steam-jacket A.

The steam-jacket is a closely-surrounding chamber, into which steam is introduced from any suitable gcnerator, through a steam-couducting pipe, as indicated by the faint lines x-x in iig. 3.

The shafts C are arranged, at equal distances apart,

around the centre of the vesselrand are supported, so

as to rotate therein, in vertical positions, and with their upper ends projecting ab'ove the top plate of the vessel B, and are fitted with gear-wheels D, whereby the rotary motion given to one shaft, by any suitable motive-power connected therewith, will give like motions to all the others. (See fig. 1.)

The arms c c' are adjustably fixed on the shafts C, and each arm is yprovided with four or more pointed, flat, rigid, verticalA projectionsor fingers 2 2, presenting their at sides in the direction of the circular course in which they are carried around by the arms on the rotating'shafts C. (Sec figs. 2 and 3.)

In the operation oi' this mixer,in the process of making artificial fuel, the hot plastic mass, consisting of powdered coal and pitch, or rosin, as described in the specification marked Division C, is run into the vessel B, through the opening in its top plate, the slides b,'in its bottom, being closed, and motion given to the shafts O by any suitable motive-power; and at the same time, steam being admitted freely into the jacket A, from any suitable generator, the mass will necessarily soon become thoroughly or most intimately mixed, the steam entering through the several series of the perforations 3 3, and serving`to keep the mass hot 'and more` easily worked during the operation of the machine.

.The mass having become thoroughly and intimately mxed, the sliding plates b are drawnl out, and thus open communication, produced between the interior of the vessel B and the sliding or Yreciprocating moulds of any suitable condensing-apparatus or press, which moulds are intended to be applied, for the purpose, to the bottom of the said vessel B.

It will be seen. that this mixer, operating in connection with tlfe surrounding steam-jacket, as de scribed, will accomplish t-lreobject required in the most effectual and rapid manner.`

Having thus fully described my invention,

What I claim as new, and desire to secure by Let.- ters Patent, is confined to the following, vizi l. The mixing-vessel B, in combination with a -surrounding steam-jacket, A, opening into the vessel B, through the series ot' small perfor-ations 3 3, in the sides of the said vessel, substantially as and for thc purpose described.

2. In combination with the vessel B, and the steamjacket A, communicating therewith, as described, I claim the series of armed shafts C C C O, arranged and operating together simultaneously, asand for .the purpose described.

3. In combination with the arms c c of the rotary shafts O O, I claim the pointed, flat, vertical projections or fingers 2 2, arranged to operate substantially as and for the purpose described'.

T. M..MITCHELL, .EYny.

Witnessesz' BENJ. Monrsou,

WM. H. MoRrSoN. 

